package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {
        log.info("自动填充切面");
    }
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始自动填充");
        //获取当前被拦截的方法上的数据库操作类型
        // 将连接点的签名转换为方法签名
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        // 从方法签名中获取当前执行方法的注解
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);
        // 从注解中获取操作类型
        OperationType operationType = autoFill.value();

        Object[] args = joinPoint.getArgs();
        if (args.length == 0 || args == null) {
            return;
        }
        Object entity = args[0];
        LocalDateTime now = LocalDateTime.now();
        Object currentId = BaseContext.getCurrentId();

        if (operationType == OperationType.INSERT){
            Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);

            setCreateTime.invoke(entity, now);  
            setUpdateUser.invoke(entity, currentId);
            setUpdateTime.invoke(entity, now);
            setCreateUser.invoke(entity, currentId);
        }else if (operationType == OperationType.UPDATE){

            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);

            setUpdateUser.invoke(entity, currentId);
            setUpdateTime.invoke(entity, now);
        }

    }
}
